Front-head construction for percussive tools.



F.M. SLATER.

FRONT HEAD CONSTRUCTION FOR PERCUSSIVE TOOLS.

AiPLlCATlON FILED DEC. 10. 1917..

Patented Sept. 10, 1918.

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ATTORNEY been 1:. asthma}. or EASTON,

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PENNSYLVANIA; term to messy.-

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Application tiled December To all whom it may c0nceni.'=;

e itknown that I, Se m citizen 'of the United States, residing at' "Easto'n, in the county-of Northampton and State of Pennsylvania, have invented'a cer -i tain new and useful Im rotement in Front-i.

Head Construction for; ercussive Tools, of

which the following is afspecification.

This invention relatesto. neumatic or percussive tools and especial ysto an improved form of front head construction for such tools,"- i i The objects of the resent invention are to improve the present orm of front head construction, to increase its resiliency, to make the construction more durable, and to coin-v pletely inclose' the resilient means within the parts of the front headf. r

- a In the usual form of front head construction atflpresent used in percussive tools, the

, tool is rovided with side rods extending the full engthj of the tool and havingspnngs mounted on their front ends so that the front head may be resiliently held in its osition against the front end of the cyl-" inder. means which take the, form ofstrong spiral springs are limited to two in number and with the increasing weight and power of percussive tools a 'sufiicient resilienc can not be obtained conveniently without t e use of very heavy wire, which is difli l t t0 O i into a suitable spring within the distance and dimensions available. It is therefore desirable to increase the number of indi-. vidual springs in order that each one may he made of, more suitable wire and have i the length of the side rods.

greater flexibility. It is also desirable that the springs be inclosed within the front" head, for the reason that when mounted on the side rods they are exposed to injury when the tool is used and unduly increase It is to overcome theabove disadvantages that the prescut construction has been devised.

Obviously, if desired, the improved construction may be applied to the back head of the percussive tool in the same manner, as

to the front head and in this construction the same advantages and improvements over:

the usual construction are obtained.

In the drawings annexed and fornfliig a i part of this specification,

Figurel shows a longitudinal iew in section ofthe front end a percussive tool In this construction the resilient Specification unner- Patent. P tented Sept. 10, 191$,

10, 1917. serial-Io. scal ng;

made in accordancewith theipre flti y cylinder 1 is located a front head Wwhicli" is provided with a central longitudinal hole" through which the drill steel 4 projects into the cylinder. 5, far-enough to be struck by, the piston (i at the forward end of its stroke In advance of the front head 2 and stir rounding the forward projection 2 of the same is a retaining col ar .7 which is pro vided with a series of depressions 8 ineitch ofwhich is located ,a compressive spiral spring; 9. The rings 9. are of greater length 'than the epressionsfi so that the: springs {project slightly from the de mom; 8 no press against the flange 10 o the front'ltead 2. I

Theside rods 11 are provided as usu these toolsextending from the rear to. front end of the tool. Thfi pass thro ln s 12 provided on the forward end off cy inder 1, through the flange 10 of the front, head 2 and through the' retaining collar These rods 11 may be tightened and loosened if -i bymeans of nuts mounted on the rear ends of the side rods in the usual manner, (not shown). i

From the above description it'will be seen i that the cylinder 1 and the collar 7 are-sei ourc'din fixed relation to one another by theside rods 11, and that the front head 2 resiliently held against the frontae nd of the cylinder 1 by the springs 9 interposed between said front heed'and collar, 111 8 mitting the front head 2 to yield struck by the piston 6 and to recover. its sition against the front end of the ylin er 1, which occurs if-the tool is operated-when the drill steel 4 is not in a rope! position; It is to be underst od that the present showing and description disclose only one; s ifleembodime'n or my Pres n ,invenr' fend other forms and modifications are? ipeuided' within the spirit and scope thereof, as expressed in the appended claims.

. What I claim is:

1. In a tool of the character described, in combination, a cylinderbody, a; cylinder head, and retaining collar; said retaining collar being provided with depressions, 111

tool is shown at 1. At the: frontend of this posed between said cylinder head and retaining collar and engaging said parts and meansholding said parts'together. 4. In a tool of the character described, in

combination, a cylinder body, a cylinder I head and a retaining collar, a plurality of 1 springs inclosed within said cylinder and retaining collar resiliently forcin cylinder head against said cylinde means holding said parts together.

5. In a 'tool of the character describ'ed,11 n combination, a cylinder body, a cylinder? head and a retaining collar resilient rneans interposed between'said cylinder head and retaining collar andengaging said parts and means holding said parts together. 4

h. In a. tool of the character described, in combination, a cylinder body, 'a cylinder hcad, and a collar, a plurality of springs interposed between said cylinder head and collar and resiliently forcing one of said parts against said cylinder and means for holding said parts together. 1

In testimony whereof, I have hereunto set my hand.

F ED M. SLATER. 

